Notre Dame is one of the most-visited monuments in the world. But a cathedral is not only a monument; it is a place of prayer and also a "book" written in stone. This little book will give you some clues to decipher the message that Notre Dame wants to give you. Measures 7" x 7" x .25"Notre Dame is one of the most-visited monuments in the world. But a cathedral is not only a monument; it is a place of prayer and also a "book" written in stone. This little book will give you some clues to decipher the message that Notre Dame wants to give you. Measures 7" x 7" x .25"